Zone 2: Heart Rate Trainer

Zone 2 training is the science-backed foundation of mitochondrial health, VO2 Max growth, and longevity. But "Zone 2 minutes" alone don't tell you whether you're actually building a longer healthspan. Zone 2 Longevity Coach computes a composite Longevity Score (0–100) from four weighted dimensions — Zone 2 minutes (40%), sleep (30%), VO2 Max (20%), and resting heart rate (10%) — pulled directly from Health Connect. Every week, an AI coach reads your data and produces a personalized summary plus three recommendations that are deliberately biased toward your weakest dimension, so each action moves your score the most. WHAT'S INSIDE • Composite Longevity Score with weighted breakdown across the four pillars • Personalized Zone 2 heart rate range via the Karvonen method (resting HR + age) • Weekly AI coaching summary written specifically against your week's data • Zone 2, VO2, and sleep trend charts • Weekly history • Adaptive Zone 2 weekly target PREMIUM • 7-day free trial — no charge during the trial, cancel anytime • Monthly or annual subscription • Unlock Weekly AI Coaching • Complete longevity score PRIVACY • Health data is read directly from Health Connect on your device • No third-party analytics or ad SDKs • Account + all server-side data deletable from Settings This app is not a medical device. It does not diagnose, treat, or prevent any condition. Consult your physician before changing your training routine. Privacy Policy: https://ootssu.com/zone2/privacy.html